| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Biodegradable Materials for Medical Applications II
|
| Presentation Title |
B-3: Deformation Localization of Zn-Cu-Mn-Mg Alloys Designed for Bioresorbable Medical Implants |
| Author(s) |
Morteza Shaker Ardakani, Ehsan Mostaed, Stephen L. Kampe, Jaroslaw W. Drelich |
| On-Site Speaker (Planned) |
Morteza Shaker Ardakani |
| Abstract Scope |
Zinc and its alloys are a class of bioresorbable metals being investigated for medical implant applications. Despite some success in formulating alloys with desired strengths and ductility through compositional modifications and thermo-mechanical processing, some concerns remain regarding the deformation localization that undermines the creep resistance of these alloys. In this study, several Zn-xCu-yMn-0.05Mg alloys were formulated and their microstructures and tensile properties characterized after hot/cold rolling followed by annealing at a wide range of temperatures and times. Zn-1.0Cu-0.2Mn-0.05Mg alloy, in as-rolled condition, exhibited tensile strength and elongation of 393 MPa and 35%, respectively, along with a significant work softening behavior. Post-rolling annealing at 320℃ successfully suppresses the work softening behavior, but the tensile strength and elongation drop significantly to 233 MPa and 27%, respectively. The results indicate a change in deformation mechanism from phase/grain boundary sliding to dislocation slipping is responsible for the work hardening. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |